practitioner vs professional

practitioner and professional both are nouns.

Word	Noun	Adjective	Verb	Adverb
practitioner	Yes	No	No	No
professional	Yes	Yes	No	No

As nouns, professional is a hypernym of practitioner; that is, professional is a word with a broader meaning than practitioner:

Other hypernyms of practitioner include professional person.

practitioner (noun)	professional (noun)
someone who practices a learned profession	a person engaged in one of the learned professions
	an authority qualified to teach apprentices
	an athlete who plays for pay

practitioner (adjective)	professional (adjective)
	engaged in a profession or engaging in as a profession or means of livelihood
	characteristic of or befitting a profession or one engaged in a profession
	of or relating to a profession
	of or relating to or suitable as a profession
	engaged in by members of a profession